GB/T 6324.5-2008Test method of organic chemical products -- Part 5: Determination of trace quantities of carbonyl compounds in organic chemicals (English PDF)

Foreword

GB/T 6324 Test method of organic chemical products consists of six parts.

- Part 1.Water miscibility test of liquid organic chemical products;

- Part 2.Determination of dry residue after evaporation on a water bath for

volatile organic liquids;

- Part 3.Determination of permanganate-reducing substances;

- Part 4.Determination of trace sulfur in organic liquid products -

Microcoulometric method;

- Part 5.Determination of trace quantities of carbonyl compounds in

organic chemicals;

- Part 6.Determination of color for liquids - Tristimulus colorimetry.

This Part is the fifth part of GB/T 6324 and an integrated revision of GB/T

6324.5-1986 and GB/T 6324.6-1986.

The revision of this Part adopts the Standard of American Society for Testing

and Materials ASTM E 411-2005 Standard Test Method for Trace Quantities of

Carbonyl Compounds with 2,4-Dinitrophenylhydrazine (English version).

This Part was redrafted based on ASTM E 411-2005.Annex A lists the

comparison on clause number between this Part and ASTM E 411-2005.

Considering national conditions of China, this Part made some modifications

when adopting ASTM E 411-2005.The main difference is as follows.

- added determination of carbonyl compounds - volumetric method (4.2 of

this Part), so as to cooperate with the change of the method

determination range.

This Part replaces GB/T 6324.5-1986 Organic chemical products for industrial

use--Determination of content of carbonyl compounds present--Volumetric

method and GB/T 6324.6-1986 Organic chemical products for industrial use--

Determination of content of carbonyl compounds present in small amounts--

Photometric method.

Compared with GB/T 6324.5-1986 and GB/T 6324.6-1986, the main changes

are as follows.

- modified the name of this Part from "Organic chemical products for

industrial use--Determination of content of carbonyl compounds present"

to "Test method of organic chemical products - Part 5.Determination of

trace quantities of carbonyl compounds in organic chemicals" (cover of

Edition 1986, cover of this Edition);

- made the corresponding changes for "Scope" (Clause 1 of Edition 1986,

Clause 1 of this Edition);

- added spectrophotometric method (see 4.2);

- in the spectrophotometric method, it modified the standard substance

from acetophenone to 2-butanone, test temperature from 50°C to room

temperature, color development time from 5 min to 12 min, color

development wavelength from 445 nm to 480 nm; modified "use ethanol

to adjust the instrument zero point " to "adjust the zero point of the

spectrophotometer with water" (3.5 and Clause 5 of Edition 1986, 4.2.2.5

and 4.2.4 of this Edition);

- in volumetric method, it added that when the endpoint color change is not

obvious, it could use the potentiometric method to determine the end (see

4.3).

Annex A of this Part is informative.

This Part was proposed by China Petroleum and Chemical Industry Association.

This Part shall be under the jurisdiction of Subcommittee on Organic, National

Technical Committee on Chemical of Standardization Administration of China

(SAC/TC 63 / SC 2).

Main drafting organizations of this Part. Jinan IFT Science & Technology Co.,

Ltd., Shandong Chemical Research Institute.

The drafting organization of this Part. China Petrochemical Corporation Jinzhou

Petrochemical Company.

Main drafter of this Part. Qiu Juan, Cui Aihong, Yu Pengling, Qi Xinyu, Li Debo.

Versions of standard substituted by this Standard are.

- GB/T 6324.5-1986, GB/T 6324.6-1986.

Test method of organic chemical products –

Part 5.Determination of trace quantities of carbonyl

compounds in organic chemicals

WARNING This Part does not address all safety issues related to the use

of standards. It is user's responsibility to take appropriate safety and

protective measures and to ensure compliance with the relevant national

regulations. See Clause 3 for information on safety and precautionary

measures.

1 Scope

This Part specifies the test methods for determination of carbonyl compounds

in organic chemical products. spectrophotometric method and volumetric

method.

This Part is applicable to the determination of carbonyl compounds in water-

soluble and alcohol-soluble organic chemical products. The spectrophotometric

method is applicable to the sample determination of which carbonyl compound

mass fraction is less than or equal to 0.01%. The volumetric method is

applicable to the sample determination of which carbonyl compound mass

fraction is greater than 0.01%.

2 Normative references

The following standards contain the provisions which, through reference in this

Part, constitute the provisions of this Part. For dated references, subsequent

amendments (excluding corrections) or revisions do not apply to this Part.

However, the parties who enter into agreement based on this Part are

encouraged to investigate whether the latest versions of these documents are

applicable. For undated reference documents, the latest versions apply to this

Part.

GB/T 601-2002 Chemical Reagent - Preparations of Standard Volumetric

Solutions

GB/T 603-2002 Chemical Reagent - Preparations of Reagent Solution for

Use in Test (ISO 6353-1.1982, NEQ)

GB/T 6682-2008 Water for analytical laboratory use - Specification and test

methods (eqv ISO 3696.1987)

3 Safety and preventative measures

4 Test method

3 water as specified in GB/T 6682-2008 can be used in the analysis.

5 Expression of results

Take the arithmetic mean of the results of two parallel determinations as the

measurement result.

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